ChatGPT Developer Mode: Full MCP client access

#1

Post by meetpateltech » Wed, Sep 10, 2025, 4:04 PM UTC

ChatGPT Developer Mode: Full MCP client access
platform.openai.com

Re: ChatGPT Developer Mode: Full MCP client access

#2

Post by ranger_danger » Wed, Sep 10, 2025, 4:28 PM UTC

First the page gave me an error message. I refreshed and then it said my browser was "out of date" (read: fingerprint resistance is turned on). Turned that off and now I just get an endless captcha loop.

I give up.

Re: ChatGPT Developer Mode: Full MCP client access

#3

Post by CuriouslyC » Wed, Sep 10, 2025, 4:37 PM UTC

I've been waiting for ChatGPT to get MCPs, this is pretty sweet. Next step is a local system control plane MCP to give it sandbox access/permission requests so I can use it as an agent from the web.

Re: ChatGPT Developer Mode: Full MCP client access

#4

Post by knowaveragejoe » Wed, Sep 10, 2025, 4:37 PM UTC

ranger_danger wrote: post #2

First the page gave me an error message. I refreshed and then it said my browser was "out of date" (read: fingerprint resistance is turned on). Turned that off and now I just get an endless captcha loop. I give up.

Same.

Re: ChatGPT Developer Mode: Full MCP client access

#5

Post by Nzen » Wed, Sep 10, 2025, 4:38 PM UTC

ranger_danger wrote: post #2

First the page gave me an error message. I refreshed and then it said my browser was "out of date" (read: fingerprint resistance is turned on). Turned that off and now I just get an endless captcha loop. I give up.

tl;dr OpenAI provided, a default-disabled, beta MCP interface. It will allow a person to view and enable various MCP tools. It requires human approval of the tool responses, shown as raw json. This won't protect against misuse, so they warn the reader to check the json against unintended prompts / consequences / etc.

Re: ChatGPT Developer Mode: Full MCP client access

#6

Post by tosh » Wed, Sep 10, 2025, 4:38 PM UTC

I tried to connect our MCP (https://technicalseomcp.com) but got an error.

I don't see any debugging features yet

but I found an example implementation in the docs:

https://platform.openai.com/docs/mcp

Re: ChatGPT Developer Mode: Full MCP client access

#7

Post by dormento » Wed, Sep 10, 2025, 4:39 PM UTC

ranger_danger wrote: post #2

First the page gave me an error message. I refreshed and then it said my browser was "out of date" (read: fingerprint resistance is turned on). Turned that off and now I just get an endless captcha loop. I give up.

When you think about it, isn't it kind of a developer's experience?

Re: ChatGPT Developer Mode: Full MCP client access

#8

Post by ayhanfuat » Wed, Sep 10, 2025, 4:40 PM UTC

tosh wrote: post #6

I tried to connect our MCP ( https://technicalseomcp.com ) but got an error. I don't see any debugging features yet but I found an example implementation in the docs: https://platform.openai.com/docs/mcp

What is the error you are getting? I get "Error fetching OAuth configuration" with an MCP server that I can connect to via Claude.

Re: ChatGPT Developer Mode: Full MCP client access

#9

Post by ObnoxiousProxy » Wed, Sep 10, 2025, 4:44 PM UTC

CuriouslyC wrote: post #3

I've been waiting for ChatGPT to get MCPs, this is pretty sweet. Next step is a local system control plane MCP to give it sandbox access/permission requests so I can use it as an agent from the web.

I'm actually working on an MCP control plane and looking for anyone who might have a use case for this / would be down to chat about it. We're gonna release it open source once we polish it in the next few weeks. Would you be up to connect?

You can check out our super rough version here, been building it for the past two weeks: gateway.aci.dev

Re: ChatGPT Developer Mode: Full MCP client access

#10

Post by simonw » Wed, Sep 10, 2025, 4:53 PM UTC

Wow this is dangerous. I wonder how many people are going to turn this on without understanding the full scope of the risks it opens them up to.

It comes with plenty of warnings, but we all know how much attention people pay to those. I'm confident that the majority of people messing around with things like MCP still don't fully understand how prompt injection attacks work and why they are such a significant threat.